9. Prokaryotes 2008 posted

9. Prokaryotes 2008 posted - Macroevolution I. Major...

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Macroevolution I. Major transitions in the history of life I. How do major innovations arise? I. Role of time II. Limitations of natural selection
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B. Evolution of new functions Exaptation Phenotypic plasticity  
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Exaptation http://www.explorenm.com/plants/Vitaceae/Vitis/arizonica/03/tendrils_6486.jpg Tendril
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Origin of lungs Lung fis h
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Evolved structures not  engineered from scratch Are modified from pre- existing structures Therefore, design often not  optimal Structures embed traces of  their history
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Which of the following structures with their  current functions most likely involved  exaptation during its evolution, i.e.,  went  through an evolutionary change in function? A. Vertebrate eye/light reception B. Fish fin/swimming C. Bird wing/flight D. Stomach/digestion
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http://www.nature.com/nature/journal/v440/n7085/images/nature04637-f4.2.jpg Locomotion on land Lobefinned fishes Tetrapods
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A. Evolution of complex structures B. Evolution of new functions C. Role of genetics and development I. Origins of major innovation
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This note was uploaded on 07/13/2008 for the course BIO 151 taught by Professor Grinblat during the Spring '08 term at Wisconsin.

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9. Prokaryotes 2008 posted - Macroevolution I. Major...

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